
APPENDICES
APP - 31
MELSEC-A
Table 2.2
Special registers list (Continue)
Number
Name
Description
Details
Applicable CPU
D9141
D9142
D9143
D9144
D9145
D9146
D9147
D9148
D9149
D9150
D9151
D9152
D9153
D9154
D9155
D9156
D9157
D9158
D9159
D9160
D9161
D9162
D9163
D9164
D9165
D9166
D9167
D9168
D9169
D9170
D9171
D9172
Number of times
of retry execution
Number of retries
• Stores the number of retries executed to I/O modules or
remote terminal modules which caused communication
error.
(Retry processing is executed the number of times set at
D9174.)
• Data becomes 0 when communication is restored to
normal.
• Station number setting of I/O modules and remote
terminal modules is as shown below.
b15 to b8
b7 to b0
D9141
Station 2
Station 4
Station 6
Station 62
Station 64
Station 1
Station 3
Station 5
Station 61
Station 63
D9142
D9171
D9172
D9143
• Retry counter uses 8 bits for one station.
b(n+7)
0/1
Number of retries
b(n+6)
b(n+5)
b(n+4)
b(n+3) b(n+2)
b(n+1)
b(n+0)
0: Normal
1: Station error
"n" is determined by station number of I/O module or
remote terminal module.
Odd number stations: b0 to b7 (n = 0)
Even number stations: b8 to b15 (n = 8)
—
Usable with A2C
and A52G.
Содержание A1SH
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